A cell phone company offers a contract for which the cost C, in dollars, of T minutes of telephoning is given by C=0.25(t-600)+71.95, where it is assumed the t greater than 600 minutes. What times will keep costs between $119.20 and $135.45?

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algebra - A cellular phone company offers a contract for which the cost C, in ...
math - A cellular phone company offers a a contract for which the cost C, in ...
Math - A celluar phone company offers a contract for which the cost c, in ...
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Algebra - A cell phone company offers a contract which cost C, in dollars, of t ...
Algebra - A cellular offers a contract for which the cost C, in dollars, of t ...